25450051505 has 32 divisors (see below), whose sum is σ = 32964408960. Its totient is φ = 18804234240.

The previous prime is 25450051477. The next prime is 25450051519. The reversal of 25450051505 is 50515005452.

It is not a de Polignac number, because 25450051505 - 2¹² = 25450047409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 596795 + ... + 638015.

It is an arithmetic number, because the mean of its divisors is an integer number (1030137780).

Almost surely, 2^25450051505 is an apocalyptic number.

It is an amenable number.

25450051505 is a deficient number, since it is larger than the sum of its proper divisors (7514357455).

25450051505 is a wasteful number, since it uses less digits than its factorization.

25450051505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41409.

The product of its (nonzero) digits is 25000, while the sum is 32.

Adding to 25450051505 its reverse (50515005452), we get a palindrome (75965056957).

The spelling of 25450051505 in words is "twenty-five billion, four hundred fifty million, fifty-one thousand, five hundred five".